Bench-vise.



PATENTED JUNE 23, 1903;.

1). SMITH. BENCH VISB.

APPLIUA-TIOH'PILED JUNE 16, 1902.

N0 MODEL.

UNITED STATES Patented June 23, 1903.

PATENT OFFICE.

-HALF TO LEON L. COLE, OF MILLERSTOWVN, KENTUCKY.

BENCH-VISE.

SPECIFICATION forming part of Letters Patent No. 732,013, dated June 23, 1903.

Application filed June 16,1902. Serial No. 111,988. (No model.) 2

To all whom it may concern:

Be it known that 1, DAVID LARKIN SMITH, a citizen of the United States, residing at Millerstown, in the county of Grayson, State of Kentucky, have invented certain new and useful Improvements in Bench-Vises; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to bench-Vises; and it has for its object to provide'in connection with a bench a vise wherein the jaws will remain at all times parallel when it is desired to clamp material having parallel faces and in which the movable jaw may be adjusted to clamp material in which the faces are not parallel, the movable jaw during the movement thereof into and out of clamping position being maintained in constant relation to a vertical plane.

Other objects and advantages of the invention will be understood from the following description.

In the drawings forming a portion of this specification, and in which like numerals of reference indicate similar parts in both views, Figure 1 is an end elevation, partly in section and showing a portion of the bench with the vise applied thereto. Fig. 2 is aview similar to Fig. 1 and showing the movable jaw adjusted to a different position.

Referring now to the drawings, there is shown a bench comprising legs 5, top 6, front 7, back 8, cross-piece 9, and brace 10, said brace extending from the lower portion of the front leg upwardly and rearwardly to the upper portion of the corresponding rear leg with its upper end resting against the lower edge of the cross-piece 9. Through the front leg 5 of the bench are formed upper and lower perforations 11 and 12, and the perforation 12 is countersunk at its forward end to receive the bushing 13, which is internally threaded and forms a nut to receive the lower screw 14. Against the rear face of the leg 5 and concentric with the perforation 11 is secured a second nut 15, with which is engaged the upper screw 16, which is passed also through the perforation 11 and recess 17, formed in the front 7 of the bench.

A movable jaw 18 is provided and has a perforation 19 in its upper portion through which the screw 16 is passed, said screw having a T-shaped head 20, the end of the stem of which bears against the plate 21,.which is secured against the outer face of the movable jaw. The head 20 is hollow to receive the usual bar 22, by means of which the screw is rotated to feed the movable jaw toward and away from the fixed jaw.

The outer end of the screw 14 is unthreaded and reduced and is engaged in the tapered recess 23 in the inner face of the lower end portion of the movable jaw and against the metal wear-plate 24, the end of the screw being adapted to turn freely in said recess, which forms a bearing for the screw. By reason of the tapered formation of the recess 23 the movable jaw may be moved to lie at various angles to the screw 14.

Two sprocket-wheels 25 and 26 are provided, sprocket-wheel 25 being disposed upon the screw 16, in which position it is held fixedly and adj ustably by the set-screw 27,'engaged with its hub and which impinges against the screw. The sprocket-wheel 26 is disposed upon the screw 14 and is heid in the same manner as the sprocket 25 by means of set screw 28. Connecting the sprocketwheels is a chain 29, through the medium of which motion is transmitted. from the sprocket-wheel on shaft 16 to the sprocketwheel on the shaft 14. With this construction it will be seen that as the screw 16 is rotated the screw 14 will be rotated, and While the screw 16 moves the upper end of the movable jaw toward the fixed jaw the screw 14 permits corresponding movement of the lower end of the movable jaw at the same speed only as the upper end, while when the screws are reversely rotated the movable jaw is forced positively at both ends fromthe fixed jaw. The movable jaw if parallel with the fixed jaw at any time is maintained in its parallel relation at all times.

The fact that the gear-wheels or sprocketwheels may be shifted on the screws permits the movable jaw to be adjusted to any angle to the fixed jaw, after which the sprockets may be again secured to the screws in alinement to work the movable jaw back and forth without changing its angular relation to the fixedj aw. 'When the jaws are in mutual contact, the hub of the sprocket-wheel 25 enters the recess 17.

It will be understood that in practice modifications of the Specific construction shown may be made and that any suitable materials and proportions may be used for the Various parts without departing from the spirit of the invention.

What is claimed is- In a vise, the combination with a vise having a fixed jaw having perforations arranged one above the other and provided with nuts fixedly disposed in alinement with the perforations, of a movable jaw having a perforation therethrough, a screw passed through said perforation and the upper perforation of the fixed jaw and engaged with the nut of the latter, said screw having a shoulder disposed to impinge against the outer face of the movable jaw, the movable jaw having a tapered socket in the lower portion of its inner face and a wear plate *in the bottom thereof, a second screw engaged with thelower perforation of the fixed jaw and the nut thereof and having a reduced outer end engaged in the tapered recess or socket against the wearplate, whereby the movable jaw may be held at various angles to the second screw, sprockets mounted upon the screws and adjustable longitudinally thereof, and a sprocket-chain engaged with the sprocket, whereby the movable jaw may be operated at various angles to the fixed jaw.

In testimony whereof I affix: my signature in presence of two witnesses. 1

DAVID LARKIN SMITH.

Witnesses:

D. E. MCCLURE, J. M. KING. 7 

